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首页> 外文期刊>Journal of refractive surgery >Sequential ablation approach to the correction of mixed astigmatism.
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Sequential ablation approach to the correction of mixed astigmatism.

机译：序贯消融治疗混合散光的方法。

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PURPOSE: To evaluate the safety, efficacy, and stability of LASIK, using positive cylinder and negative sphere nomograms in sequence (sequential ablation) to correct mixed astigmatism. METHODS: This prospective study included 40 eyes of 20 patients with mixed astigmatism. Patients underwent bilateral sequential ablation LASIK using the Technolas 217 excimer laser (Bausch & Lomb Surgical, Rochester, NY). The main outcome measures, uncorrected visual acuity (UCVA) and best spectacle-corrected visual acuity (BSCVA), were evaluated 3 and 12 months after surgery. RESULTS: Preoperative astigmatism ranged from +1.75 to +6.00 diopters (D) and negative sphere from -0.50 to -3.00 D. The postoperative refraction at 3 months remained unchanged at 1 year postoperative in all patients. A total of 32 (80%) eyes showed no significant residual astigmatism (<0.50 D); the remaining 8 (20%) eyes had 0.50 to 1.00 D of residual astigmatism. Residual negative sphere was present in 2 eyes of 2 patients with a planned monovision target. In the remaining 38 (95%) eyes, no significant residual negative sphere was present. Sixteen (40%) eyes had one line of improvement in BSCVA. No eye lost lines of visual acuity. The efficacy index shows that uncorrected vision after surgery is equal or better than corrected vision before surgery. Less corneal tissue is removed and fewer laser spots are required compared to other techniques for the correction of mixed astigmatism. CONCLUSIONS: The sequential ablation approach to the correction of mixed astigmatism was efficacious, safe, and stable 1 year after surgery.
机译：目的：为了评估LASIK的安全性，有效性和稳定性，依次使用正圆柱体和负球体诺模图（顺序消融）校正混合散光。方法：这项前瞻性研究纳入了20例混合散光患者的40眼。患者使用Technolas 217准分子激光（Bausch＆Lomb Surgical，纽约州罗切斯特）进行双侧顺序消融LASIK。术后3个月和12个月评估了主要结局指标，即未矫正视力（UCVA）和最佳眼镜矫正视力（BSCVA）。结果：术前散光范围为+1.75至+6.00屈光度（D），负球面范围为-0.50至-3.00D。所有患者术后3个月的屈光度在术后1年均保持不变。共有32只（80％）的眼睛没有明显的残留散光（<0.50 D）;其余8只（20％）眼睛的残余散光为0.50至1.00D。计划中的monovision靶标的2例患者的2眼中存在残余负球。在其余38眼（95％）中，没有明显的残留负球。十六只（40％）眼睛的BSCVA改善了一行。没有视力丧失的眼睛。功效指数表明，手术后未矫正的视力等于或优于手术前矫正的视力。与用于校正混合散光的其他技术相比，去除了更少的角膜组织，并且需要的激光点更少。结论：序贯消融术治疗混合散光术后1年有效，安全，稳定。

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